[libcxx-commits] [PATCH] D141779: [libc++][PSTL] Copy the headers into libc++

[Ruslan Arutyunyan via Phabricator via libcxx-commits]

rarutyun added a subscriber: rodgert.
rarutyun added a comment.

> If there is no parallel backend available, the serial backend should be used instead of not providing anything. I also don't really see a use-case for disabling specific policies.

As far as I remember the it was done in libstdc++ when serial backend was not available but the idea also was to remove third-party dependencies (@rodgert could correct me if I am wrong) libstdc++ 9 just includes TBB headers by default if `#include <execution>" appears in the code: https://godbolt.org/z/MGaccsq9a

If there is any need to disable parallel policies today - I am not sure. If a good comes in my head at some point I'll let you know.


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https://reviews.llvm.org/D141779